목요일 3월 05, 2009

The International Year of Astronomy 2009

The International Year of Astronomy 2009 is a global effort initiated by the International Astronomical Union (IAU) and UNESCO to help the citizens of the world rediscover their place in the Universe through the day- and night-time sky, and thereby engage a personal sense of wonder and discovery.

Branding and Identity Guidelines

The official name of this global celebration is the International Year of Astronomy, abbreviated IYA2009.

The official slogan of the IYA2009 is "The Universe, Yours to Discover".

The official logo of the IYA2009, which also incorporates the slogan, appears on this page in several formats. We can provide versions of the logo with the text translated into other languages; e-mail your translations to iya2009@eso.org.

We encourage widespread use of the IYA2009 logo by individuals and groups who organize or support IYA2009 activities. An IYA2009 "activity" is here understood to be an event, exhibit, performance, commercial or promotional product, print or electronic publication, or other creation intended to advance the aims of the IYA2009 as described elsewhere on this website.

In order to use the IYA2009 logo you need to provide contact information and a brief description of your IYA2009 activity/product to your National Node Chair, including the URL of your IYA-related website, if applicable, as well as time and place. If the country in which you are organizing an IYA activity/product does not have an IYA2009 National Node Chair, or if the activity/product is of an international nature, you will provide the required information to the IAU's IYA2009 Secretary instead.

If you use the IYA2009 logo on a website or in any other electronic publication that supports hyperlinks, you should link to www.astronomy2009.org as well as to your National Node's IYA2009 website, if applicable.

As a rule of thumb, the IYA2009 logos must not be modified. Please contact the IYA2009 Secretariat in case of doubt (please submit your graphics).

The IAU Officers and the IAU Executive Committee Working Group for the IYA2009 reserve the right to revoke the use of the logo by any individual or group at any time for any reason, and you agree to promptly comply with any such revocation.

All IYA2009 National Nodes are required to show the IYA2009 logo on their Web pages and on any printed or electronic materials produced to support the IYA2009. All other organizers and supporters of IYA2009 activities are encouraged to do the same.

Note: All use of the UNESCO|IAU logo shall only occur with the explicit permission of the IYA2009 Secretariat in writing, and shall only be used for the event or events covered by that permission and that any use which in accordance with such permission shall be reported immediately to the National Node and the IYA2009 Secretariat for corrective action, failing which the IAU reserves the right to withdraw permission to use the IAU logo.

THE IYA2009 LOGO

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Type Font: Swiss 721 BT

IYA2009 CORNERSTONE PROJECTS' LOGOS

Cornerstone projects' official logos, in various formats for download, can be found on this link.

MICROSOFT POWERPOINT PRESENTATION TEMPLATE:

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If you would like a web banner similar to the one for the UK shown below, please e-mail prusso@eso.org.

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BUSINESS CARD (example from the UK):

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LETTER HEAD (example from the UK):

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National Design Kits

Posted at 02:55오후 3월 05, 2009 by yglee in Starry Night | Permalink

수요일 9월 10, 2008

Digital Image Processing WorkShop'06

Where : Korea Astronomy and Space Science Institute.

me...

About of Calibration of CCD images ...

Calibration (or PRE-PROCESSING) of an astronomical CCD deep-sky image consists of removing the bias and thermal contribution (DARK FRAME) and dividing the resultant image by the FLAT-FIELD in order to standardize the response of each image pixel.

Calibrated = (Raw - Bias - Thermal) / Flat = (Raw - Dark) / Flat

The DARK frame should be removed firstly from the RAW image then the result should be divided by the FLAT-FIELD.

DARK FRAME

A dark frame is an integration in which no light strikes the CCD. It records the BIAS noise and THERMAL noise for a specific CCD temperature and integration time:

DARK FRAME = BIAS FRAME + THERMAL FRAME

To take a dark frame you can simply cap your telescope and integrate using the same time that you are using for acquiring the raw image. If you are not able to control the chip temperature (+/- 0.1 °C), dark frames should be taken immediately before or after taking a raw image.

For better results shoot lots of dark frames and AVERAGE or MEDIAN SUM them. Averaging frames reduces the random components by the square root of the number of frames averaged: although it takes more time, you will obtain better images.

BIAS FRAME

The bias frame is an image made with an integration of zero seconds and shutter closed. It contains the amplifier zero-point offset, the random readout noise from the amplifier and the noise from camera electronics.

CCD cameras made for scientific imaging usually include the ability to read out a bias frame but for the simple purpose of subtracting THERMAL FRAME and BIAS, a DARK FRAME serves equally well (DARK FRAME = BIAS + THERMAL FRAME). The examination of a bias frame tells you if your camera is working properly: if you see wavy lines or patterns, your camera may not be functioning well.

FLAT-FIELD

The FLAT-FIELD frame is a photosite-by-photosite map of a CCD's sensitivity to light. It is an image of a uniform object such as twilight sky or a sheet of opal glass attached to the inside of the observatory dome. Chip sensitivity, vignetting and dust all appear as variations in the sensitivity of the CCD itself: division by FLAT-FIELD will remove these defects.

When you make a raw FLAT-FIELD, then you must subtract the THERMAL and the BIAS frame from it (or the DARK). For the lowest possible noise, AVERAGE more then one FLAT-FIELD to obtain a Master Flat-Field.

Three different methods of calibration can be used:

* Basic calibration - requires a master dark with the same integration time as the raw image;
* Standard calibration – requires a master dark that has the same integration time as the raw image and a master flat;
* Advanced calibration – requires a master flat, a master dark (same or longer integration time) and a master bias.

Basic calibration is adequate for simple observing tasks. Standard calibration corrects for vignetting and CCD nonuniformity, but constrains you to the same integration timr for your images and darks. Advanced calibration gives you the freedom to use different integration times for your images and provides superior dark subtraction via dark-frame matching.
Individual dark and flat fielded frames or calibrated images can be added or averaged for better results.

Posted at 04:15오후 9월 10, 2008 by yglee in Starry Night | Permalink

화요일 6월 03, 2008

SEEING IN THE DARK

Introduction

Image credit: Francis Kenny

Seeing in the Dark, a dramatic new PBS special by award-winning journalist and author Timothy Ferris, premieres at 8 p.m. September 19th on most PBS stations (check local listings for exact dates and times.) It explores the delights and rewards of amateur astronomy and chronicles the contributions that amateurs are making to the science and art of astronomy. The program was produced in state-of-the-art high definition and features many great images and animations that you and your students are likely to enjoy.

The Astronomical Society of the Pacific has been working with Timothy Ferris to provide educational materials for the interactive web site accompanying the show (The Seeing in the Dark Web Site) and to let educators know about the program and the educational opportunities that go with it. We thus devote this special issue of The Universe in the Classroom to Seeing in the Dark. We hope you enjoy the materials from and about the show, and encourage you to write to us if you find interesting ways to use it in your classroom.

Posted at 02:14오후 6월 03, 2008 by yglee in Starry Night | Permalink

목요일 11월 08, 2007

Comet Holmes on evening Nov ...

Surprising Comet Holmes remains easily visible as a round, fuzzy cloud in the northern constellation Perseus. In that night I had a fairly good transparency condition without the Moonlight, could observe the dimmed distribution of ionized composition of the comet.

Posted at 03:23오후 11월 08, 2007 by yglee in Starry Night | Permalink

목요일 5월 11, 2006

What is the important quality of friends?

What do you want most in a friend ? someone who is intelligent, or someone who has a sense of humor, or someone who is reliable? Which one of these characteristics is most important to you? Use reasons and specific examples to explain your choice.

Every people have their own preference when making a new friend. Some judges the person by intelligence, some by wealth, and some by a sense of humor. Among all, I like to make friends who share similar character from me. People can become more friendly with each other and can cooperate well.
Friends who are similar to each other can get close with each other very easily. They usually share same preference, belief, and idea. By doing various things they both like together, they can get close without much effort. For example, a Korean rapper Tablo was once isolated from the society of musicians because his idea about writing a lyric was too unique. However, he met a person who has the same preference of music composition as him, and his band eventually became one of the most famous bands in Korea.

Friends who share similar qualities can cooperate well. When people who have the opposite character work together, they sometimes engage in debates and in sometimes, in a fight. However, when friends whose personality resembles each other, they can understand each other well, and they tend to respect each other. In fact, in many cases, they usually come up with identical ideas about the solution of the problem. In this manner, making a friend with analogous features is beneficial.

There are many ways to judge a person to be a friend. Money and intelligence is just a few of them. I think making a friend whose character resembles with each other is the best way to make a good friend. They can become very close to each other, and they can cooperate better. Making rich or smart friends can help you materially, but making similar friend would be making a honest and friendly mate.

Posted at 07:47오전 5월 11, 2006 by yglee in Starry Night | Permalink

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YoungGon Lee's Weblog... Starry Night's Sun Story ...

목요일 3월 05, 2009